Sonion Nederland B.v.

Michel Bosman

Aart Zeger Van Halteren

Adrianus Maria Lafort

Raymond Mögelin

Dion Ivo De Roo

Michel De Nooij

Roelof A Marissen

Roelof Albert Marissen

The present invention relates to a microphone that includes a housing and a diaphragm and backplate located with the housing. The housing has a sound port for receiving the sound. The diaphragm undergoes movement relative to the backplate, which it opposes, in response to the incoming sound. The backplate has a charged layer with a first surface that is exposed to the diaphragm and a second surface opposite the first surface. The backplate further includes a conductor for transmitting a signal from the backplate to electronics in the housing. The conductor faces the second surface of the charged layer. To minimize the charge degradation created by contact with or infiltration of foreign materials, the first surface, the second surface, or both surfaces of the charged layer includes a protective layer thereon.

Electret assembly for a microphone having a backplate with improved charge stability

Growing community of inventors

Delft, Netherlands

Michel Bosman